Analects, Books Seven, Eight, and Eleven

I find passage 7:4 most odd. It simply reads "In his leisure moments, the Master was composed and yet fully at ease". Why was this even here? Its lesson is inconsequential at best and completely ridiculous at worst. It seems to mean that even when relaxed you have to be prim and proper, which is a contradiction and this oddly seems to suggest that those who saw him at those moments saw him when he wasn't really leisurely.

I like that passage 7:8 says that the Master won't strive for those that won't strive, meaning that one must work as well, or not get anything at all. It implies that one really must have passion for what you want to achieve, which connects to 7:12 where the master states he follows what he loves.

Confucius seems to particularly like music, as seen in passages 7:14, 7:32, 8:8.